Table 2.2 The distribution of guiding modes (hours)
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   SI      IN      EC      GY      CT      FL Total
  WFP  17.700   4.890  12.639   1.002 125.898 162.129
  FOC   0.000   0.000   0.000   0.000  13.751  13.751
  FOS   0.397   0.000   0.813   4.001  64.564  69.775
  HRS  13.477   0.000   0.000   0.000  16.928  30.405
  FGS   0.000   0.000   0.000   0.000   0.074   0.074
Total  31.574   4.890  13.453   5.003 221.214 276.135
    %  11.434   1.771   4.872   1.812  80.111 100.000
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SI = Science Instrument
IN = Internal
EC = Earth Calibration
GY = Gyro
CT = Coarse Track
FL = Fine Lock
%  = Percentage